src/logind-dbus.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2011 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <pwd.h>
  26
  27 #include "logind.h"
  28 #include "dbus-common.h"
  29 #include "strv.h"
  30 #include "polkit.h"
  31
  32 #define BUS_MANAGER_INTERFACE                                           \
  33         " <interface name=\"org.freedesktop.login1.Manager\">\n"        \
  34         "  <method name=\"GetSession\">\n"                              \
  35         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  36         "   <arg name=\"session\" type=\"o\" direction=\"out\"/>\n"     \
  37         "  </method>\n"                                                 \
  38         "  <method name=\"GetUser\">\n"                                 \
  39         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  40         "   <arg name=\"user\" type=\"o\" direction=\"out\"/>\n"        \
  41         "  </method>\n"                                                 \
  42         "  <method name=\"GetSeat\">\n"                                 \
  43         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  44         "   <arg name=\"seat\" type=\"o\" direction=\"out\"/>\n"        \
  45         "  </method>\n"                                                 \
  46         "  <method name=\"ListSessions\">\n"                            \
  47         "   <arg name=\"sessions\" type=\"a(susso)\" direction=\"out\"/>\n" \
  48         "  </method>\n"                                                 \
  49         "  <method name=\"ListUsers\">\n"                               \
  50         "   <arg name=\"users\" type=\"a(uso)\" direction=\"out\"/>\n"  \
  51         "  </method>\n"                                                 \
  52         "  <method name=\"ListSeats\">\n"                               \
  53         "   <arg name=\"seats\" type=\"a(so)\" direction=\"out\"/>\n"   \
  54         "  </method>\n"                                                 \
  55         "  <method name=\"CreateSession\">\n"                           \
  56         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  57         "   <arg name=\"leader\" type=\"u\" direction=\"in\"/>\n"       \
  58         "   <arg name=\"sevice\" type=\"s\" direction=\"in\"/>\n"       \
  59         "   <arg name=\"type\" type=\"s\" direction=\"in\"/>\n"         \
  60         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  61         "   <arg name=\"vtnr\" type=\"u\" direction=\"in\"/>\n"         \
  62         "   <arg name=\"tty\" type=\"s\" direction=\"in\"/>\n"          \
  63         "   <arg name=\"display\" type=\"s\" direction=\"in\"/>\n"      \
  64         "   <arg name=\"remote\" type=\"b\" direction=\"in\"/>\n"       \
  65         "   <arg name=\"remote_user\" type=\"s\" direction=\"in\"/>\n"  \
  66         "   <arg name=\"remote_host\" type=\"s\" direction=\"in\"/>\n"  \
  67         "   <arg name=\"controllers\" type=\"as\" direction=\"in\"/>\n" \
  68         "   <arg name=\"reset_controllers\" type=\"as\" direction=\"in\"/>\n" \
  69         "   <arg name=\"kill_processes\" type=\"b\" direction=\"in\"/>\n" \
  70         "   <arg name=\"id\" type=\"s\" direction=\"out\"/>\n"          \
  71         "   <arg name=\"path\" type=\"o\" direction=\"out\"/>\n"        \
  72         "   <arg name=\"runtime_path\" type=\"o\" direction=\"out\"/>\n" \
  73         "   <arg name=\"fd\" type=\"h\" direction=\"out\"/>\n"          \
  74         "  </method>\n"                                                 \
  75         "  <method name=\"ActivateSession\">\n"                         \
  76         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  77         "  </method>\n"                                                 \
  78         "  <method name=\"TerminateSession\">\n"                        \
  79         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  80         "  </method>\n"                                                 \
  81         "  <method name=\"TerminateUser\">\n"                           \
  82         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  83         "  </method>\n"                                                 \
  84         "  <method name=\"TerminateSeat\">\n"                           \
  85         "   <arg name=\"id\" type=\"s\" direction=\"in\"/>\n"           \
  86         "  </method>\n"                                                 \
  87         "  <method name=\"SetUserLinger\">\n"                           \
  88         "   <arg name=\"uid\" type=\"u\" direction=\"in\"/>\n"          \
  89         "   <arg name=\"b\" type=\"b\" direction=\"in\"/>\n"            \
  90         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  91         "  </method>\n"                                                 \
  92         "  <method name=\"AttachDevice\">\n"                            \
  93         "   <arg name=\"seat\" type=\"s\" direction=\"in\"/>\n"         \
  94         "   <arg name=\"sysfs\" type=\"s\" direction=\"in\"/>\n"        \
  95         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  96         "  </method>\n"                                                 \
  97         "  <method name=\"FlushDevices\">\n"                            \
  98         "   <arg name=\"interactive\" type=\"b\" direction=\"in\"/>\n"  \
  99         "  </method>\n"                                                 \
 100         "  <signal name=\"SessionNew\">\n"                              \
 101         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 102         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 103         "  </signal>\n"                                                 \
 104         "  <signal name=\"SessionRemoved\">\n"                          \
 105         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 106         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 107         "  </signal>\n"                                                 \
 108         "  <signal name=\"UserNew\">\n"                                 \
 109         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 110         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 111         "  </signal>\n"                                                 \
 112         "  <signal name=\"UserRemoved\">\n"                             \
 113         "   <arg name=\"uid\" type=\"u\"/>\n"                           \
 114         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 115         "  </signal>\n"                                                 \
 116         "  <signal name=\"SeatNew\">\n"                                 \
 117         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 118         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 119         "  </signal>\n"                                                 \
 120         "  <signal name=\"SeatRemoved\">\n"                             \
 121         "   <arg name=\"id\" type=\"s\"/>\n"                            \
 122         "   <arg name=\"path\" type=\"o\"/>\n"                          \
 123         "  </signal>\n"                                                 \
 124         "  <property name=\"ControlGroupHierarchy\" type=\"s\" access=\"read\"/>\n" \
 125         "  <property name=\"Controllers\" type=\"as\" access=\"read\"/>\n" \
 126         "  <property name=\"ResetControllers\" type=\"as\" access=\"read\"/>\n" \
 127         "  <property name=\"NAutoVTs\" type=\"u\" access=\"read\"/>\n" \
 128         "  <property name=\"KillOnlyUsers\" type=\"as\" access=\"read\"/>\n" \
 129         "  <property name=\"KillExcludeUsers\" type=\"as\" access=\"read\"/>\n" \
 130         "  <property name=\"KillUserProcesses\" type=\"b\" access=\"read\"/>\n" \
 131         "  <property name=\"IdleHint\" type=\"b\" access=\"read\"/>\n"  \
 132         "  <property name=\"IdleSinceHint\" type=\"t\" access=\"read\"/>\n" \
 133         "  <property name=\"IdleSinceHintMonotonic\" type=\"t\" access=\"read\"/>\n" \
 134         " </interface>\n"
 135
 136 #define INTROSPECTION_BEGIN                                             \
 137         DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE                       \
 138         "<node>\n"                                                      \
 139         BUS_MANAGER_INTERFACE                                           \
 140         BUS_PROPERTIES_INTERFACE                                        \
 141         BUS_PEER_INTERFACE                                              \
 142         BUS_INTROSPECTABLE_INTERFACE
 143
 144 #define INTROSPECTION_END                                               \
 145         "</node>\n"
 146
 147 #define INTERFACES_LIST                              \
 148         BUS_GENERIC_INTERFACES_LIST                  \
 149         "org.freedesktop.login1.Manager\0"
 150
 151 static int bus_manager_append_idle_hint(DBusMessageIter *i, const char *property, void *data) {
 152         Manager *m = data;
 153         dbus_bool_t b;
 154
 155         assert(i);
 156         assert(property);
 157         assert(m);
 158
 159         b = manager_get_idle_hint(m, NULL) > 0;
 160         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_BOOLEAN, &b))
 161                 return -ENOMEM;
 162
 163         return 0;
 164 }
 165
 166 static int bus_manager_append_idle_hint_since(DBusMessageIter *i, const char *property, void *data) {
 167         Manager *m = data;
 168         dual_timestamp t;
 169         uint64_t u;
 170
 171         assert(i);
 172         assert(property);
 173         assert(m);
 174
 175         manager_get_idle_hint(m, &t);
 176         u = streq(property, "IdleSinceHint") ? t.realtime : t.monotonic;
 177
 178         if (!dbus_message_iter_append_basic(i, DBUS_TYPE_UINT64, &u))
 179                 return -ENOMEM;
 180
 181         return 0;
 182 }
 183
 184 static int bus_manager_create_session(Manager *m, DBusMessage *message, DBusMessage **_reply) {
 185         Session *session = NULL;
 186         User *user = NULL;
 187         const char *type, *seat, *tty, *display, *remote_user, *remote_host, *service;
 188         uint32_t uid, leader, audit_id = 0;
 189         dbus_bool_t remote, kill_processes;
 190         char **controllers = NULL, **reset_controllers = NULL;
 191         SessionType t;
 192         Seat *s;
 193         DBusMessageIter iter;
 194         int r;
 195         char *id = NULL, *p;
 196         uint32_t vtnr = 0;
 197         int fifo_fd = -1;
 198         DBusMessage *reply = NULL;
 199         bool b;
 200
 201         assert(m);
 202         assert(message);
 203         assert(_reply);
 204
 205         if (!dbus_message_iter_init(message, &iter) ||
 206             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 207                 return -EINVAL;
 208
 209         dbus_message_iter_get_basic(&iter, &uid);
 210
 211         if (!dbus_message_iter_next(&iter) ||
 212             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 213                 return -EINVAL;
 214
 215         dbus_message_iter_get_basic(&iter, &leader);
 216
 217         if (leader <= 0 ||
 218             !dbus_message_iter_next(&iter) ||
 219             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 220                 return -EINVAL;
 221
 222         dbus_message_iter_get_basic(&iter, &service);
 223
 224         if (!dbus_message_iter_next(&iter) ||
 225             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 226                 return -EINVAL;
 227
 228         dbus_message_iter_get_basic(&iter, &type);
 229         t = session_type_from_string(type);
 230
 231         if (t < 0 ||
 232             !dbus_message_iter_next(&iter) ||
 233             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 234                 return -EINVAL;
 235
 236         dbus_message_iter_get_basic(&iter, &seat);
 237
 238         if (isempty(seat))
 239                 s = NULL;
 240         else {
 241                 s = hashmap_get(m->seats, seat);
 242                 if (!s)
 243                         return -ENOENT;
 244         }
 245
 246         if (!dbus_message_iter_next(&iter) ||
 247             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_UINT32)
 248                 return -EINVAL;
 249
 250         dbus_message_iter_get_basic(&iter, &vtnr);
 251
 252         if (!dbus_message_iter_next(&iter) ||
 253             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 254                 return -EINVAL;
 255
 256         dbus_message_iter_get_basic(&iter, &tty);
 257
 258         if (tty_is_vc(tty)) {
 259                 int v;
 260
 261                 if (!s)
 262                         s = m->vtconsole;
 263                 else if (s != m->vtconsole)
 264                         return -EINVAL;
 265
 266                 v = vtnr_from_tty(tty);
 267
 268                 if (v <= 0)
 269                         return v < 0 ? v : -EINVAL;
 270
 271                 if (vtnr <= 0)
 272                         vtnr = (uint32_t) v;
 273                 else if (vtnr != (uint32_t) v)
 274                         return -EINVAL;
 275
 276         } else if (!isempty(tty) && s && seat_is_vtconsole(s))
 277                 return -EINVAL;
 278
 279         if (s) {
 280                 if (seat_is_vtconsole(s)) {
 281                         if (vtnr <= 0 || vtnr > 63)
 282                                 return -EINVAL;
 283                 } else {
 284                         if (vtnr > 0)
 285                                 return -EINVAL;
 286                 }
 287         }
 288
 289         if (!dbus_message_iter_next(&iter) ||
 290             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 291                 return -EINVAL;
 292
 293         dbus_message_iter_get_basic(&iter, &display);
 294
 295         if (!dbus_message_iter_next(&iter) ||
 296             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN)
 297                 return -EINVAL;
 298
 299         dbus_message_iter_get_basic(&iter, &remote);
 300
 301         if (!dbus_message_iter_next(&iter) ||
 302             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 303                 return -EINVAL;
 304
 305         dbus_message_iter_get_basic(&iter, &remote_user);
 306
 307         if (!dbus_message_iter_next(&iter) ||
 308             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING)
 309                 return -EINVAL;
 310
 311         dbus_message_iter_get_basic(&iter, &remote_host);
 312
 313         if (!dbus_message_iter_next(&iter) ||
 314             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 315             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING)
 316                 return -EINVAL;
 317
 318         r = bus_parse_strv_iter(&iter, &controllers);
 319         if (r < 0)
 320                 return -EINVAL;
 321
 322         if (strv_contains(controllers, "systemd") ||
 323             !dbus_message_iter_next(&iter) ||
 324             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
 325             dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_STRING) {
 326                 r = -EINVAL;
 327                 goto fail;
 328         }
 329
 330         r = bus_parse_strv_iter(&iter, &reset_controllers);
 331         if (r < 0)
 332                 goto fail;
 333
 334         if (strv_contains(reset_controllers, "systemd") ||
 335             !dbus_message_iter_next(&iter) ||
 336             dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_BOOLEAN) {
 337                 r = -EINVAL;
 338                 goto fail;
 339         }
 340
 341         dbus_message_iter_get_basic(&iter, &kill_processes);
 342
 343         r = manager_add_user_by_uid(m, uid, &user);
 344         if (r < 0)
 345                 goto fail;
 346
 347         audit_session_from_pid(leader, &audit_id);
 348
 349         if (audit_id > 0) {
 350                 asprintf(&id, "%lu", (unsigned long) audit_id);
 351
 352                 if (!id) {
 353                         r = -ENOMEM;
 354                         goto fail;
 355                 }
 356
 357                 session = hashmap_get(m->sessions, id);
 358
 359                 if (session) {
 360
 361                         fifo_fd = session_create_fifo(session);
 362                         if (fifo_fd < 0) {
 363                                 r = fifo_fd;
 364                                 goto fail;
 365                         }
 366
 367                         /* Session already exists, client is probably
 368                          * something like "su" which changes uid but
 369                          * is still the same audit session */
 370
 371                         reply = dbus_message_new_method_return(message);
 372                         if (!reply) {
 373                                 r = -ENOMEM;
 374                                 goto fail;
 375                         }
 376
 377                         p = session_bus_path(session);
 378                         if (!p) {
 379                                 r = -ENOMEM;
 380                                 goto fail;
 381                         }
 382
 383                         b = dbus_message_append_args(
 384                                         reply,
 385                                         DBUS_TYPE_STRING, &session->id,
 386                                         DBUS_TYPE_OBJECT_PATH, &p,
 387                                         DBUS_TYPE_STRING, &session->user->runtime_path,
 388                                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 389                                         DBUS_TYPE_INVALID);
 390                         free(p);
 391
 392                         if (!b) {
 393                                 r = -ENOMEM;
 394                                 goto fail;
 395                         }
 396
 397                         close_nointr_nofail(fifo_fd);
 398                         *_reply = reply;
 399
 400                         return 0;
 401                 }
 402
 403         } else {
 404                 do {
 405                         free(id);
 406                         asprintf(&id, "c%lu", ++m->session_counter);
 407
 408                         if (!id) {
 409                                 r = -ENOMEM;
 410                                 goto fail;
 411                         }
 412
 413                 } while (hashmap_get(m->sessions, id));
 414         }
 415
 416         r = manager_add_session(m, user, id, &session);
 417         free(id);
 418         if (r < 0)
 419                 goto fail;
 420
 421         session->leader = leader;
 422         session->audit_id = audit_id;
 423         session->type = t;
 424         session->remote = remote;
 425         session->controllers = controllers;
 426         session->reset_controllers = reset_controllers;
 427         session->kill_processes = kill_processes;
 428         session->vtnr = vtnr;
 429
 430         controllers = reset_controllers = NULL;
 431
 432         if (!isempty(tty)) {
 433                 session->tty = strdup(tty);
 434                 if (!session->tty) {
 435                         r = -ENOMEM;
 436                         goto fail;
 437                 }
 438         }
 439
 440         if (!isempty(display)) {
 441                 session->display = strdup(display);
 442                 if (!session->display) {
 443                         r = -ENOMEM;
 444                         goto fail;
 445                 }
 446         }
 447
 448         if (!isempty(remote_user)) {
 449                 session->remote_user = strdup(remote_user);
 450                 if (!session->remote_user) {
 451                         r = -ENOMEM;
 452                         goto fail;
 453                 }
 454         }
 455
 456         if (!isempty(remote_host)) {
 457                 session->remote_host = strdup(remote_host);
 458                 if (!session->remote_host) {
 459                         r = -ENOMEM;
 460                         goto fail;
 461                 }
 462         }
 463
 464         if (!isempty(service)) {
 465                 session->service = strdup(service);
 466                 if (!session->service) {
 467                         r = -ENOMEM;
 468                         goto fail;
 469                 }
 470         }
 471
 472         fifo_fd = session_create_fifo(session);
 473         if (fifo_fd < 0) {
 474                 r = fifo_fd;
 475                 goto fail;
 476         }
 477
 478         if (s) {
 479                 r = seat_attach_session(s, session);
 480                 if (r < 0)
 481                         goto fail;
 482         }
 483
 484         r = session_start(session);
 485         if (r < 0)
 486                 goto fail;
 487
 488         reply = dbus_message_new_method_return(message);
 489         if (!reply) {
 490                 r = -ENOMEM;
 491                 goto fail;
 492         }
 493
 494         p = session_bus_path(session);
 495         if (!p) {
 496                 r = -ENOMEM;
 497                 goto fail;
 498         }
 499
 500         b = dbus_message_append_args(
 501                         reply,
 502                         DBUS_TYPE_STRING, &session->id,
 503                         DBUS_TYPE_OBJECT_PATH, &p,
 504                         DBUS_TYPE_STRING, &session->user->runtime_path,
 505                         DBUS_TYPE_UNIX_FD, &fifo_fd,
 506                         DBUS_TYPE_INVALID);
 507         free(p);
 508
 509         if (!b) {
 510                 r = -ENOMEM;
 511                 goto fail;
 512         }
 513
 514         close_nointr_nofail(fifo_fd);
 515         *_reply = reply;
 516
 517         return 0;
 518
 519 fail:
 520         strv_free(controllers);
 521         strv_free(reset_controllers);
 522
 523         if (session)
 524                 session_add_to_gc_queue(session);
 525
 526         if (user)
 527                 user_add_to_gc_queue(user);
 528
 529         if (fifo_fd >= 0)
 530                 close_nointr_nofail(fifo_fd);
 531
 532         if (reply)
 533                 dbus_message_unref(reply);
 534
 535         return r;
 536 }
 537
 538 static bool device_has_tag(struct udev_device *d, const char *tag) {
 539         struct udev_list_entry *first, *item;
 540
 541         assert(d);
 542         assert(tag);
 543
 544         /* FIXME */
 545         udev_device_get_is_initialized(d);
 546
 547         first = udev_device_get_tags_list_entry(d);
 548         udev_list_entry_foreach(item, first)
 549                 if (streq(udev_list_entry_get_name(item), tag))
 550                         return true;
 551
 552         return false;
 553 }
 554
 555 static int trigger_device(Manager *m, const char *prefix) {
 556         struct udev_enumerate *e;
 557         struct udev_list_entry *first, *item;
 558         int r;
 559
 560         assert(m);
 561
 562         e = udev_enumerate_new(m->udev);
 563         if (!e) {
 564                 r = -ENOMEM;
 565                 goto finish;
 566         }
 567
 568         if (udev_enumerate_scan_devices(e) < 0) {
 569                 r = -EIO;
 570                 goto finish;
 571         }
 572
 573         first = udev_enumerate_get_list_entry(e);
 574         udev_list_entry_foreach(item, first) {
 575                 char *t;
 576                 const char *p;
 577
 578                 p = udev_list_entry_get_name(item);
 579
 580                 if (prefix && !path_startswith(p, prefix))
 581                         continue;
 582
 583                 t = strappend(p, "/uevent");
 584                 if (!t) {
 585                         r = -ENOMEM;
 586                         goto finish;
 587                 }
 588
 589                 write_one_line_file(t, "change");
 590                 free(t);
 591         }
 592
 593         r = 0;
 594
 595 finish:
 596         if (e)
 597                 udev_enumerate_unref(e);
 598
 599         return r;
 600 }
 601
 602 static int attach_device(Manager *m, const char *seat, const char *sysfs) {
 603         struct udev_device *d;
 604         char *rule = NULL, *file = NULL;
 605         const char *id_for_seat;
 606         int r;
 607
 608         assert(m);
 609         assert(seat);
 610         assert(sysfs);
 611
 612         d = udev_device_new_from_syspath(m->udev, sysfs);
 613         if (!d)
 614                 return -ENODEV;
 615
 616         if (!device_has_tag(d, "seat")) {
 617                 r = -ENODEV;
 618                 goto finish;
 619         }
 620
 621         id_for_seat = udev_device_get_property_value(d, "ID_FOR_SEAT");
 622         if (!id_for_seat) {
 623                 r = -ENODEV;
 624                 goto finish;
 625         }
 626
 627         if (asprintf(&file, "/etc/udev/rules.d/72-seat-%s.rules", id_for_seat) < 0) {
 628                 r = -ENOMEM;
 629                 goto finish;
 630         }
 631
 632         if (asprintf(&rule, "TAG==\"seat\", ENV{ID_FOR_SEAT}==\"%s\", ENV{ID_SEAT}=\"%s\"", id_for_seat, seat) < 0) {
 633                 r = -ENOMEM;
 634                 goto finish;
 635         }
 636
 637         mkdir_p("/etc/udev/rules.d", 0755);
 638         r = write_one_line_file_atomic(file, rule);
 639         if (r < 0)
 640                 goto finish;
 641
 642         r = trigger_device(m, sysfs);
 643
 644 finish:
 645         free(rule);
 646         free(file);
 647
 648         if (d)
 649                 udev_device_unref(d);
 650
 651         return r;
 652 }
 653
 654 static int flush_devices(Manager *m) {
 655         DIR *d;
 656
 657         assert(m);
 658
 659         d = opendir("/etc/udev/rules.d");
 660         if (!d) {
 661                 if (errno != ENOENT)
 662                         log_warning("Failed to open /etc/udev/rules.d: %m");
 663         } else {
 664                 struct dirent *de;
 665
 666                 while ((de = readdir(d))) {
 667
 668                         if (!dirent_is_file(de))
 669                                 continue;
 670
 671                         if (!startswith(de->d_name, "72-seat-"))
 672                                 continue;
 673
 674                         if (!endswith(de->d_name, ".rules"))
 675                                 continue;
 676
 677                         if (unlinkat(dirfd(d), de->d_name, 0) < 0)
 678                                 log_warning("Failed to unlink %s: %m", de->d_name);
 679                 }
 680
 681                 closedir(d);
 682         }
 683
 684         return trigger_device(m, NULL);
 685 }
 686
 687 static DBusHandlerResult manager_message_handler(
 688                 DBusConnection *connection,
 689                 DBusMessage *message,
 690                 void *userdata) {
 691
 692         Manager *m = userdata;
 693
 694         const BusProperty properties[] = {
 695                 { "org.freedesktop.login1.Manager", "ControlGroupHierarchy",  bus_property_append_string,   "s",  m->cgroup_path          },
 696                 { "org.freedesktop.login1.Manager", "Controllers",            bus_property_append_strv,     "as", m->controllers          },
 697                 { "org.freedesktop.login1.Manager", "ResetControllers",       bus_property_append_strv,     "as", m->reset_controllers    },
 698                 { "org.freedesktop.login1.Manager", "NAutoVTs",               bus_property_append_unsigned, "u",  &m->n_autovts           },
 699                 { "org.freedesktop.login1.Manager", "KillOnlyUsers",          bus_property_append_strv,     "as", m->kill_only_users      },
 700                 { "org.freedesktop.login1.Manager", "KillExcludeUsers",       bus_property_append_strv,     "as", m->kill_exclude_users   },
 701                 { "org.freedesktop.login1.Manager", "KillUserProcesses",      bus_property_append_bool,     "b",  &m->kill_user_processes },
 702                 { "org.freedesktop.login1.Manager", "IdleHint",               bus_manager_append_idle_hint, "b",  m                       },
 703                 { "org.freedesktop.login1.Manager", "IdleSinceHint",          bus_manager_append_idle_hint_since, "t", m                  },
 704                 { "org.freedesktop.login1.Manager", "IdleSinceHintMonotonic", bus_manager_append_idle_hint_since, "t", m                  },
 705                 { NULL, NULL, NULL, NULL, NULL }
 706         };
 707
 708         DBusError error;
 709         DBusMessage *reply = NULL;
 710         int r;
 711
 712         assert(connection);
 713         assert(message);
 714         assert(m);
 715
 716         dbus_error_init(&error);
 717
 718         if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSession")) {
 719                 const char *name;
 720                 char *p;
 721                 Session *session;
 722                 bool b;
 723
 724                 if (!dbus_message_get_args(
 725                                     message,
 726                                     &error,
 727                                     DBUS_TYPE_STRING, &name,
 728                                     DBUS_TYPE_INVALID))
 729                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 730
 731                 session = hashmap_get(m->sessions, name);
 732                 if (!session)
 733                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 734
 735                 reply = dbus_message_new_method_return(message);
 736                 if (!reply)
 737                         goto oom;
 738
 739                 p = session_bus_path(session);
 740                 if (!p)
 741                         goto oom;
 742
 743                 b = dbus_message_append_args(
 744                                 reply,
 745                                 DBUS_TYPE_OBJECT_PATH, &p,
 746                                 DBUS_TYPE_INVALID);
 747                 free(p);
 748
 749                 if (!b)
 750                         goto oom;
 751
 752         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetUser")) {
 753                 uint32_t uid;
 754                 char *p;
 755                 User *user;
 756                 bool b;
 757
 758                 if (!dbus_message_get_args(
 759                                     message,
 760                                     &error,
 761                                     DBUS_TYPE_UINT32, &uid,
 762                                     DBUS_TYPE_INVALID))
 763                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 764
 765                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
 766                 if (!user)
 767                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 768
 769                 reply = dbus_message_new_method_return(message);
 770                 if (!reply)
 771                         goto oom;
 772
 773                 p = user_bus_path(user);
 774                 if (!p)
 775                         goto oom;
 776
 777                 b = dbus_message_append_args(
 778                                 reply,
 779                                 DBUS_TYPE_OBJECT_PATH, &p,
 780                                 DBUS_TYPE_INVALID);
 781                 free(p);
 782
 783                 if (!b)
 784                         goto oom;
 785
 786         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "GetSeat")) {
 787                 const char *name;
 788                 char *p;
 789                 Seat *seat;
 790                 bool b;
 791
 792                 if (!dbus_message_get_args(
 793                                     message,
 794                                     &error,
 795                                     DBUS_TYPE_STRING, &name,
 796                                     DBUS_TYPE_INVALID))
 797                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 798
 799                 seat = hashmap_get(m->seats, name);
 800                 if (!seat)
 801                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 802
 803                 reply = dbus_message_new_method_return(message);
 804                 if (!reply)
 805                         goto oom;
 806
 807                 p = seat_bus_path(seat);
 808                 if (!p)
 809                         goto oom;
 810
 811                 b = dbus_message_append_args(
 812                                 reply,
 813                                 DBUS_TYPE_OBJECT_PATH, &p,
 814                                 DBUS_TYPE_INVALID);
 815                 free(p);
 816
 817                 if (!b)
 818                         goto oom;
 819
 820         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSessions")) {
 821                 char *p;
 822                 Session *session;
 823                 Iterator i;
 824                 DBusMessageIter iter, sub;
 825                 const char *empty = "";
 826
 827                 reply = dbus_message_new_method_return(message);
 828                 if (!reply)
 829                         goto oom;
 830
 831                 dbus_message_iter_init_append(reply, &iter);
 832
 833                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(susso)", &sub))
 834                         goto oom;
 835
 836                 HASHMAP_FOREACH(session, m->sessions, i) {
 837                         DBusMessageIter sub2;
 838                         uint32_t uid;
 839
 840                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 841                                 goto oom;
 842
 843                         uid = session->user->uid;
 844
 845                         p = session_bus_path(session);
 846                         if (!p)
 847                                 goto oom;
 848
 849                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->id) ||
 850                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 851                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &session->user->name) ||
 852                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, session->seat ? (const char**) &session->seat->id : &empty) ||
 853                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 854                                 free(p);
 855                                 goto oom;
 856                         }
 857
 858                         free(p);
 859
 860                         if (!dbus_message_iter_close_container(&sub, &sub2))
 861                                 goto oom;
 862                 }
 863
 864                 if (!dbus_message_iter_close_container(&iter, &sub))
 865                         goto oom;
 866
 867         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListUsers")) {
 868                 char *p;
 869                 User *user;
 870                 Iterator i;
 871                 DBusMessageIter iter, sub;
 872
 873                 reply = dbus_message_new_method_return(message);
 874                 if (!reply)
 875                         goto oom;
 876
 877                 dbus_message_iter_init_append(reply, &iter);
 878
 879                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(uso)", &sub))
 880                         goto oom;
 881
 882                 HASHMAP_FOREACH(user, m->users, i) {
 883                         DBusMessageIter sub2;
 884                         uint32_t uid;
 885
 886                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 887                                 goto oom;
 888
 889                         uid = user->uid;
 890
 891                         p = user_bus_path(user);
 892                         if (!p)
 893                                 goto oom;
 894
 895                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_UINT32, &uid) ||
 896                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &user->name) ||
 897                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 898                                 free(p);
 899                                 goto oom;
 900                         }
 901
 902                         free(p);
 903
 904                         if (!dbus_message_iter_close_container(&sub, &sub2))
 905                                 goto oom;
 906                 }
 907
 908                 if (!dbus_message_iter_close_container(&iter, &sub))
 909                         goto oom;
 910
 911         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ListSeats")) {
 912                 char *p;
 913                 Seat *seat;
 914                 Iterator i;
 915                 DBusMessageIter iter, sub;
 916
 917                 reply = dbus_message_new_method_return(message);
 918                 if (!reply)
 919                         goto oom;
 920
 921                 dbus_message_iter_init_append(reply, &iter);
 922
 923                 if (!dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, "(so)", &sub))
 924                         goto oom;
 925
 926                 HASHMAP_FOREACH(seat, m->seats, i) {
 927                         DBusMessageIter sub2;
 928
 929                         if (!dbus_message_iter_open_container(&sub, DBUS_TYPE_STRUCT, NULL, &sub2))
 930                                 goto oom;
 931
 932                         p = seat_bus_path(seat);
 933                         if (!p)
 934                                 goto oom;
 935
 936                         if (!dbus_message_iter_append_basic(&sub2, DBUS_TYPE_STRING, &seat->id) ||
 937                             !dbus_message_iter_append_basic(&sub2, DBUS_TYPE_OBJECT_PATH, &p)) {
 938                                 free(p);
 939                                 goto oom;
 940                         }
 941
 942                         free(p);
 943
 944                         if (!dbus_message_iter_close_container(&sub, &sub2))
 945                                 goto oom;
 946                 }
 947
 948                 if (!dbus_message_iter_close_container(&iter, &sub))
 949                         goto oom;
 950
 951         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "CreateSession")) {
 952
 953                 r = bus_manager_create_session(m, message, &reply);
 954                 if (r == -ENOMEM)
 955                         goto oom;
 956
 957                 if (r < 0)
 958                         return bus_send_error_reply(connection, message, &error, r);
 959
 960         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
 961                 const char *name;
 962                 Session *session;
 963
 964                 if (!dbus_message_get_args(
 965                                     message,
 966                                     &error,
 967                                     DBUS_TYPE_STRING, &name,
 968                                     DBUS_TYPE_INVALID))
 969                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 970
 971                 session = hashmap_get(m->sessions, name);
 972                 if (!session)
 973                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 974
 975                 r = session_activate(session);
 976                 if (r < 0)
 977                         return bus_send_error_reply(connection, message, NULL, r);
 978
 979                 reply = dbus_message_new_method_return(message);
 980                 if (!reply)
 981                         goto oom;
 982
 983         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSession")) {
 984                 const char *name;
 985                 Session *session;
 986
 987                 if (!dbus_message_get_args(
 988                                     message,
 989                                     &error,
 990                                     DBUS_TYPE_STRING, &name,
 991                                     DBUS_TYPE_INVALID))
 992                         return bus_send_error_reply(connection, message, &error, -EINVAL);
 993
 994                 session = hashmap_get(m->sessions, name);
 995                 if (!session)
 996                         return bus_send_error_reply(connection, message, &error, -ENOENT);
 997
 998                 r = session_stop(session);
 999                 if (r < 0)
1000                         return bus_send_error_reply(connection, message, NULL, r);
1001
1002                 reply = dbus_message_new_method_return(message);
1003                 if (!reply)
1004                         goto oom;
1005
1006         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateUser")) {
1007                 uint32_t uid;
1008                 User *user;
1009
1010                 if (!dbus_message_get_args(
1011                                     message,
1012                                     &error,
1013                                     DBUS_TYPE_UINT32, &uid,
1014                                     DBUS_TYPE_INVALID))
1015                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1016
1017                 user = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1018                 if (!user)
1019                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1020
1021                 r = user_stop(user);
1022                 if (r < 0)
1023                         return bus_send_error_reply(connection, message, NULL, r);
1024
1025                 reply = dbus_message_new_method_return(message);
1026                 if (!reply)
1027                         goto oom;
1028
1029         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "TerminateSeat")) {
1030                 const char *name;
1031                 Seat *seat;
1032
1033                 if (!dbus_message_get_args(
1034                                     message,
1035                                     &error,
1036                                     DBUS_TYPE_STRING, &name,
1037                                     DBUS_TYPE_INVALID))
1038                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1039
1040                 seat = hashmap_get(m->seats, name);
1041                 if (!seat)
1042                         return bus_send_error_reply(connection, message, &error, -ENOENT);
1043
1044                 r = seat_stop_sessions(seat);
1045                 if (r < 0)
1046                         return bus_send_error_reply(connection, message, NULL, r);
1047
1048                 reply = dbus_message_new_method_return(message);
1049                 if (!reply)
1050                         goto oom;
1051
1052         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "SetUserLinger")) {
1053                 uint32_t uid;
1054                 struct passwd *pw;
1055                 dbus_bool_t b, interactive;
1056                 char *path;
1057
1058                 if (!dbus_message_get_args(
1059                                     message,
1060                                     &error,
1061                                     DBUS_TYPE_UINT32, &uid,
1062                                     DBUS_TYPE_BOOLEAN, &b,
1063                                     DBUS_TYPE_BOOLEAN, &interactive,
1064                                     DBUS_TYPE_INVALID))
1065                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1066
1067                 errno = 0;
1068                 pw = getpwuid(uid);
1069                 if (!pw)
1070                         return bus_send_error_reply(connection, message, NULL, errno ? -errno : -EINVAL);
1071
1072                 r = verify_polkit(connection, message, "org.freedesktop.login1.set-user-linger", interactive, &error);
1073                 if (r < 0)
1074                         return bus_send_error_reply(connection, message, &error, r);
1075
1076                 r = safe_mkdir("/var/lib/systemd/linger", 0755, 0, 0);
1077                 if (r < 0)
1078                         return bus_send_error_reply(connection, message, &error, r);
1079
1080                 path = strappend("/var/lib/systemd/linger/", pw->pw_name);
1081                 if (!path)
1082                         goto oom;
1083
1084                 if (b) {
1085                         User *u;
1086
1087                         r = touch(path);
1088                         free(path);
1089
1090                         if (r < 0)
1091                                 return bus_send_error_reply(connection, message, &error, r);
1092
1093                         if (manager_add_user_by_uid(m, uid, &u) >= 0)
1094                                 user_start(u);
1095
1096                 } else {
1097                         User *u;
1098
1099                         r = unlink(path);
1100                         free(path);
1101
1102                         if (r < 0 && errno != ENOENT)
1103                                 return bus_send_error_reply(connection, message, &error, -errno);
1104
1105                         u = hashmap_get(m->users, ULONG_TO_PTR((unsigned long) uid));
1106                         if (u)
1107                                 user_add_to_gc_queue(u);
1108                 }
1109
1110                 reply = dbus_message_new_method_return(message);
1111                 if (!reply)
1112                         goto oom;
1113
1114         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "AttachDevice")) {
1115                 const char *sysfs, *seat;
1116                 dbus_bool_t interactive;
1117
1118                 if (!dbus_message_get_args(
1119                                     message,
1120                                     &error,
1121                                     DBUS_TYPE_STRING, &seat,
1122                                     DBUS_TYPE_STRING, &sysfs,
1123                                     DBUS_TYPE_BOOLEAN, &interactive,
1124                                     DBUS_TYPE_INVALID))
1125                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1126
1127                 if (!path_startswith(sysfs, "/sys") || !seat_name_is_valid(seat))
1128                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1129
1130                 r = verify_polkit(connection, message, "org.freedesktop.login1.attach-device", interactive, &error);
1131                 if (r < 0)
1132                         return bus_send_error_reply(connection, message, &error, r);
1133
1134                 r = attach_device(m, seat, sysfs);
1135                 if (r < 0)
1136                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1137
1138                 reply = dbus_message_new_method_return(message);
1139                 if (!reply)
1140                         goto oom;
1141
1142
1143         } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "FlushDevices")) {
1144                 dbus_bool_t interactive;
1145
1146                 if (!dbus_message_get_args(
1147                                     message,
1148                                     &error,
1149                                     DBUS_TYPE_BOOLEAN, &interactive,
1150                                     DBUS_TYPE_INVALID))
1151                         return bus_send_error_reply(connection, message, &error, -EINVAL);
1152
1153                 r = verify_polkit(connection, message, "org.freedesktop.login1.flush-devices", interactive, &error);
1154                 if (r < 0)
1155                         return bus_send_error_reply(connection, message, &error, r);
1156
1157                 r = flush_devices(m);
1158                 if (r < 0)
1159                         return bus_send_error_reply(connection, message, NULL, -EINVAL);
1160
1161                 reply = dbus_message_new_method_return(message);
1162                 if (!reply)
1163                         goto oom;
1164
1165         } else if (dbus_message_is_method_call(message, "org.freedesktop.DBus.Introspectable", "Introspect")) {
1166                 char *introspection = NULL;
1167                 FILE *f;
1168                 Iterator i;
1169                 Session *session;
1170                 Seat *seat;
1171                 User *user;
1172                 size_t size;
1173                 char *p;
1174
1175                 if (!(reply = dbus_message_new_method_return(message)))
1176                         goto oom;
1177
1178                 /* We roll our own introspection code here, instead of
1179                  * relying on bus_default_message_handler() because we
1180                  * need to generate our introspection string
1181                  * dynamically. */
1182
1183                 if (!(f = open_memstream(&introspection, &size)))
1184                         goto oom;
1185
1186                 fputs(INTROSPECTION_BEGIN, f);
1187
1188                 HASHMAP_FOREACH(seat, m->seats, i) {
1189                         p = bus_path_escape(seat->id);
1190
1191                         if (p) {
1192                                 fprintf(f, "<node name=\"seat/%s\"/>", p);
1193                                 free(p);
1194                         }
1195                 }
1196
1197                 HASHMAP_FOREACH(user, m->users, i)
1198                         fprintf(f, "<node name=\"user/%llu\"/>", (unsigned long long) user->uid);
1199
1200                 HASHMAP_FOREACH(session, m->sessions, i) {
1201                         p = bus_path_escape(session->id);
1202
1203                         if (p) {
1204                                 fprintf(f, "<node name=\"session/%s\"/>", p);
1205                                 free(p);
1206                         }
1207                 }
1208
1209                 fputs(INTROSPECTION_END, f);
1210
1211                 if (ferror(f)) {
1212                         fclose(f);
1213                         free(introspection);
1214                         goto oom;
1215                 }
1216
1217                 fclose(f);
1218
1219                 if (!introspection)
1220                         goto oom;
1221
1222                 if (!dbus_message_append_args(reply, DBUS_TYPE_STRING, &introspection, DBUS_TYPE_INVALID)) {
1223                         free(introspection);
1224                         goto oom;
1225                 }
1226
1227                 free(introspection);
1228         } else
1229                 return bus_default_message_handler(connection, message, NULL, INTERFACES_LIST, properties);
1230
1231         if (reply) {
1232                 if (!dbus_connection_send(connection, reply, NULL))
1233                         goto oom;
1234
1235                 dbus_message_unref(reply);
1236         }
1237
1238         return DBUS_HANDLER_RESULT_HANDLED;
1239
1240 oom:
1241         if (reply)
1242                 dbus_message_unref(reply);
1243
1244         dbus_error_free(&error);
1245
1246         return DBUS_HANDLER_RESULT_NEED_MEMORY;
1247 }
1248
1249 const DBusObjectPathVTable bus_manager_vtable = {
1250         .message_function = manager_message_handler
1251 };
1252
1253 DBusHandlerResult bus_message_filter(
1254                 DBusConnection *connection,
1255                 DBusMessage *message,
1256                 void *userdata) {
1257
1258         Manager *m = userdata;
1259         DBusError error;
1260
1261         assert(m);
1262         assert(connection);
1263         assert(message);
1264
1265         dbus_error_init(&error);
1266
1267         if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) {
1268                 const char *cgroup;
1269
1270                 if (!dbus_message_get_args(message, &error,
1271                                            DBUS_TYPE_STRING, &cgroup,
1272                                            DBUS_TYPE_INVALID))
1273                         log_error("Failed to parse Released message: %s", bus_error_message(&error));
1274                 else
1275                         manager_cgroup_notify_empty(m, cgroup);
1276         }
1277
1278         dbus_error_free(&error);
1279
1280         return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
1281 }
1282
1283 int manager_send_changed(Manager *manager, const char *properties) {
1284         DBusMessage *m;
1285         int r = -ENOMEM;
1286
1287         assert(manager);
1288
1289         m = bus_properties_changed_new("/org/freedesktop/login1", "org.freedesktop.login1.Manager", properties);
1290         if (!m)
1291                 goto finish;
1292
1293         if (!dbus_connection_send(manager->bus, m, NULL))
1294                 goto finish;
1295
1296         r = 0;
1297
1298 finish:
1299         if (m)
1300                 dbus_message_unref(m);
1301
1302         return r;
1303 }